code: def tearDownClass(cls) -> None:
      shutil.rmtree(str(DATA_DIR.resolve()))
  
file_path: qlib/tests/test_dump_data.py
imports: import sys
  import shutil
  import unittest
  from pathlib import Path
  import qlib
  import numpy
  import pandas
  from qlib.data import D
  from get_data import GetData
  from dump_bin import DumpDataAll, DumpDataFix
label_desc: Use image node_id 2 for calling the TestDumpData obj's underlying member method code with example usage: obj.tearDownClass(cls) without return types